<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Prepend the cache information to the cache file
 * and write it
 *
 * @param string $tpl_file
 * @param string $cache_id
 * @param string $compile_id
 * @param string $results
 * @return true|null
 */

// $tpl_file, $cache_id, $compile_id, $results

function smarty_core_write_cache_file($params, &$smarty)
{

	// put timestamp in cache header
	$smarty->_cache_info['timestamp'] = time();
	if ($smarty->cache_lifetime > -1){
		// expiration set
		$smarty->_cache_info['expires'] = $smarty->_cache_info['timestamp'] + $smarty->cache_lifetime;
	} else {
		// cache will never expire
		$smarty->_cache_info['expires'] = -1;
	}

	// collapse nocache.../nocache-tags
	if (preg_match_all('!\{(/?)nocache\:[0-9a-f]{32}#\d+\}!', $params['results'], $match, PREG_PATTERN_ORDER)) {
		// remove everything between every pair of outermost noache.../nocache-tags
		// and replace it by a single nocache-tag
		// this new nocache-tag will be replaced by dynamic contents in
		// smarty_core_process_compiled_includes() on a cache-read

		$match_count = count($match[0]);
		$results = preg_split('!(\{/?nocache\:[0-9a-f]{32}#\d+\})!', $params['results'], -1, PREG_SPLIT_DELIM_CAPTURE);

		$level = 0;
		$j = 0;
		for ($i=0, $results_count = count($results); $i < $results_count && $j < $match_count; $i++) {
			if ($results[$i] == $match[0][$j]) {
				// nocache tag
				if ($match[1][$j]) { // closing tag
					$level--;
					unset($results[$i]);
				} else { // opening tag
					if ($level++ > 0) unset($results[$i]);
				}
				$j++;
			} elseif ($level > 0) {
				unset($results[$i]);
			}
		}
		$params['results'] = implode('', $results);
	}
	$smarty->_cache_info['cache_serials'] = $smarty->_cache_serials;

	// prepend the cache header info into cache file
	$_cache_info = serialize($smarty->_cache_info);
	$params['results'] = strlen($_cache_info) . "\n" . $_cache_info . $params['results'];

	if (!empty($smarty->cache_handler_func)) {
		// use cache_handler function
		call_user_func_array($smarty->cache_handler_func,
		array('write', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));
	} else {
		// use local cache file

		if(!@is_writable($smarty->cache_dir)) {
			// cache_dir not writable, see if it exists
			if(!@is_dir($smarty->cache_dir)) {
				$smarty->trigger_error('the $cache_dir \'' . $smarty->cache_dir . '\' does not exist, or is not a directory.', E_USER_ERROR);
				return false;
			}
			$smarty->trigger_error('unable to write to $cache_dir \'' . realpath($smarty->cache_dir) . '\'. Be sure $cache_dir is writable by the web server user.', E_USER_ERROR);
			return false;
		}

		$_auto_id = $smarty->_get_auto_id($params['cache_id'], $params['compile_id']);
		$_cache_file = $smarty->_get_auto_filename($smarty->cache_dir, $params['tpl_file'], $_auto_id);
		$_params = array('filename' => $_cache_file, 'contents' => $params['results'], 'create_dirs' => true);
		require_once(SMARTY_CORE_DIR . 'core.write_file.php');
		smarty_core_write_file($_params, $smarty);
		return true;
	}
}

/* vim: set expandtab: */

?>
